opal_graph_compare_vertex_data 91 opal/class/opal_graph.h typedef int (*opal_graph_compare_vertex_data)(void *vertex_data1, void *vertex_data2); opal_graph_compare_vertex_data 116 opal/class/opal_graph.h opal_graph_compare_vertex_data compare_vertex; /* A function to compare between two vertices data */